heald



(No Model.) 2 Sheets-Sheet 1.

J L. HEALD.

ENGINE GOVERNOR- N0...305,816. Patented Sept. 30, 1884.

(No Model.) 2 Sheets-Sheet 2.

I Y J. L. HEALD.

ENGINE GOVERNOR.

Patexited Sept. 80, 1884.

RS. Phulomiwgnphcr. Wamirgkm, n, c.

UNITED STATES PATENT Fries...

JOHN L. HEALD, or onoonnr, CALIFORNIA.

ENGINE-GCIDVERNOR.

EaiEGIFICATION forming part of Letters Patent No. 305,816, datedSeptember 30, 188%.

' Application filed March 1, 1884. (No model.) 7

To all whom it may concern.-

Be it known that I, JOHN L. HEALD, of Crochet, county of Contra Costa,and State of California, have invented an Improvement inEngine-Governors; and I hereby declare the following to be a full,clear, and exact description thereof.

My invention relates tocertain improvements in governors which act bycentrifugal force; and it consists of a pair of weighted arms crossingeach other diagonally to a central vertical horizontally-rotating diskor table.

line, and having thin lower ends hinged to a To the sides of this tablesteel springs are secured behind each arm, so as to curve above them,the upper ends of the springs being connected by links with the upperweighted ends of the arms, so that their tendency is to counteract thecentrifugal action of the arms when in motion. The arms act upon avertical adjustable central stem which connects with a double-balancedvalve, all of which will be more fully explained by reference to theaccompanying drawings, in which- Figure 1 is a perspective view of mygovernor. Fig. 2 is a vertical section of the disk Q and connectedparts. Fig. 8 is a viewof guide-sleeve G. Figs. 4 and 5 are views ofspring and shackle. Fig. 6 is a side elevation of governor and sectionof valves. Fig, 7 is an end elevation of governor. Fig. 8 is ahorizontal section of valve-chamber. Figs. 9, 10, l1, and 12 aredetached views of arms and disk.

A is the casing within which the valve is contained. This valve issimilar to a pistonvalve, and consists of four disks or flanges, B, upona central stem, 0, which passes through the two inner seats or casings,D B. These casings are bored through the top and bottom, the openingsbeing of such size that the disks B will just fit within and close themwhen the valve is closed. The interior of the casings connect with theboiler through a passage and pipe, 6, so that steam is received intotheir interior, and when the valve is closed the disks occupying theopenings at top and bottom will receive an equal pressure and bebalanced When they are opened, the steam will escape equally upward anddownward into thelarger space within the outer casing, A, whichsurrounds the valve-seats D, and the valves will still remain balanced.The steam passes from .the casing A to the cylinder through the passaged. A stem, E, screws into the upper part of the val ve or its stem, andextends up through a stufling-box, F, and into a sleeve, G, into whichit is screwed, as shown. ArmsHproject from a collar, I, which is securedto the stem E below the sleeve G, and serve as levers by which to turnthe stem and screw it into or out ofthe sleeve, and thus adjust thevalve up or down, to suit the speed at which the engine is to run.

I is a lock-nut with similar arms, this nut locking against the lowerpart of the sleeve G, to hold the stem E at the desired point. Thesleeve G has an arm, G, extending to one side from it, and the end ofthis arm slides upon a pin, a, by which the sleeve and the stem areprevented from being rotated by the rotation of the governorarms. Astem, J, extends upward from the sleeve G through the part K, which issupported by an arm, L, from the top of the valve-casing, as shown. Ahorizontal sleeve, M, is also supported from K by arms N, and thedriving-shaft passes through this sleeve, having a pulley upon its outerend and a bevel-gear, 0, upon its inner end, to mesh with and drive thegear 1?, which is secured to the horizontal disk or table Q. Upon thistable are lugs R. between which the hubs S of the arms T are pivoted orhinged. From these hubs short arms U extend inward and press upon thetop of the stem J, which connects with and actuatcs the valve. This stemextends up into a head, V, which is free to turn loosely about it, andhas spaces or slots at each side, into which the rounded ends of thearms U enter, and when the governor acts these arms raise or lower thehead V, valvestem, and valve. The arms T extend upward and diagonallyacross each other and a central vertical upper ends have weights WV uponthem.

To the edge ofthc disk Q springs X are fixed in aline behind each of thearms T, and these springs are curved over above the arms T and weightsW. Links Y connect the upper ends of the springs with the outer ends ofthe weighted arms, so that they may move in unison. The operation willthen be as follows: The valve is set so that it will be open when lineabout which the disk rotates, and their I the governor is at rest. Whenit is set in motion, the centrifugal force causes the arms T to movedownward, pulling the springswith them, and the short arms U act .topress the valve-stem down and close the valve. If the engine slows up,the springs act to draw the arms T up again and open the valve. Thevalve is well balanced, the adjustment may be easily made withoutstopping, and the peculiar arrangement and relation of thediagonally-crossed and weighted arms and the connected springs make itextremely sensitive. The two arms T move in planes alittle on each sideof the center, which leaves room for the stem J and its head V, throughwhich connection is made with the arms U. a

- I am aware that single pairs of valves united by bars have been fittedto seats in the top and bottom of ahorizontal steam-pipe, so that whenopened the steam could escape above and below, and also that such avalvehas been .con-

'nected by-an adjustable stem with a governor,

and I do not claim, broadly, such a mechanism. Having thus described myinvention, what I claim as new, and desire to secure by Letters Patent,is-

1. In an engine-governor, the centrifugallyacting weighted arms, andvertically-moving adjustable valvestem and valve, in combinavalve-stemand valve, substantially as herein 7 described.

3. In an enginergovernor, theweighted arms crossing each otherdiagonally, and having their lower ends hinged at opposite sides of ahorizontal rotary disk, and short arms extendlng inwardly and connectingwith a verticallymoving valve throughits stem, in combination with fiatsprings secured to the edges of the disk, behind the diagonal arms,curving over them, and connected with their upper ends by links,substantially as herein described.

In witness whereof I have hereunto set my hand.

JOHN L. HEALD.

Witnesses:

S. H. N oURsn, H. 0. LEE.

